4:3 Intermittent Fasting Intervention in Adults With Breast Cancer and Overweight or Obesity

Participants are instructed to perform a modified fast (\~500 kcal) on 3 days/week with ad libitum intake the other 4 days/week. Group-based behavioral support sessions will be held by an experienced Registered Dietician. Participants will attend BfitBwell exercise sessions in person and virtually to receive individualized support to progress to 150 min/wk of moderate-intensity physical activity